Full credit now given that you first published the photo on Flickr but the photographer remains a mystery. The photo I put on here actually came from another website around a year ago.
It is always incredibly difficult to track down the original photographer but where I can I ask permission. With the power of the internet making it possible to copy and paste I usually get informed that the source did not take the actual photo.
So far only one person has refused permission as he put a monetary value to his photographs which I have respected but his superb 3 page collection can be found here
http://www.edendale.co.uk/GO/LTN.1.html as he has been good enough to put his photos of Luton taken in the late 50's and early 60's on the net.